Tribocorrosion behaviour of duplex surface treated AISI 304 stainless steel

Tribocorrosion of Passive Materials: A Review on Test Procedures and Standards

“…They observed an increase in the current and a cathodic shift of the free potential with the onset of abrasive particles to the sample. Thus, it was confirmed that the amount of current International Journal of Corrosion In both cases, the potential decreases and the current increases during sliding, as a consequence of removing the passive layer and exposing the bare material to electrolyte [89].…”

“…Therefore, the electrochemical noise registered mainly belongs to the worn working electrode. Figure 12 shows the response of current and potential before, during, and after sliding measured by electrochemical noise technique for a bare and duplex treated (plasma nitriding and deposition of CrN coatings) AISI 304 stainless steel in a Hank's Balanced Salt Solution (HBSS) [89]. In this study, the working electrode was coupled with a platinum microcathode through a ZRA.…”

“…The increase in the normal force and sliding velocity was found to induce an increase in the current and a decrease in the potential, accelerating the depassivation rate of the tested materials. From the electrochemical noise registered during tribocorrosion tests, A. de Frutos et al (2010) [89] observed the activation of the worn surface when sliding started, and they attributed local current and potential variations during the steady-state phase to the oxide removal and repassivation process taking place in the wear track ( Figure 12).…”

“…However, there is no direct way to determine the mechanical contribution to material loss in the track, and it has commonly been calculated by subtracting the chemical contribution to the total material loss, as specified in (17). In turn, the selection of the oxidation state (n number) in (16) to calculate the chemical contribution has been found to affect the results considerably [8,18,21,89]. In cases where the valence of oxidation products varies with the applied potential or for alloys, the value of n is uncertain, and detailed surface analysis such as X-ray photoelectron spectroscopy should be employed to determine it [3].…”

Structure-property-performance of nanocomposite Cr–Si–N films synthesized by a duplex surface treatment technique

“…Several studies applying various duplex surface treatments show that the presence of an intermediate layer was beneficial not only to the improvements the load carrying capacity of the coating-substrate system but also to the enhancement in the wear resistance and corrosion resistance. [24][25][26] Although there are many prior studies on the mechanical and tribological properties of Cr-Si-N films, to date, little effort has been devoted to the corrosion behavior of Cr-Si-N films. In our previous works, 27,28 a nanocrystalline Cr 3 Si film with a grain size of ,5 nm was successfully synthesized using the double glow sputtering technique to improve the mechanical properties and oxidation resistance of a titanium alloy.…”